If someone as computer illiterate and DUMB as me can manage to not infect his machine, I don't see how other people manage. Oh wait, I completely forgot how stupid most people are. Nevermind!
Note- to this day I refuse to use my G5 mac to go online AT ALL. It's an editing machine, plain and simple. Paranoid? Maybe, but that thing is building capital. Best purchase of my life along with the editing decks for what it's given me.